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    My BLV MGN cube build/upgrade saga (ongoing)

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    My Duet controlled machine
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    • whopping pochardundefined
      whopping pochard
      last edited by

      I got sidetracked designing an experimental toolchanger system...

      IMG_5192.jpeg

      I made a separate thread for that if anyone is interested!

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      • JamesMundefined
        JamesM
        last edited by

        Those small extrusion pieces you used to attach the bed will transfer heat quickly to the plastic mounts you have them in. Unless you are planning on keeping the bed temps down I would either add something to thermally insulate them from the bed or make those mounts out of something like Polymax Polymide CoPA which is rated to 140c without annealing and higher if you anneal it.

        I used railcore beds on both of my BLV printers and initially had extrusion mounted right to the tabs on the bed and they got real hot. I then just made a 3mm thick spacer from that CoPa filament between the extrusions and the bed and it helped tremendously.

        whopping pochardundefined 1 Reply Last reply Reply Quote 1
        • whopping pochardundefined
          whopping pochard @JamesM
          last edited by

          @JamesM Thanks for the tip! I've got some Nylon foam sheets in my McMaster shopping cart for just this purpose.

          I'm also rethinking the way I have the kinematic mount designed. The current layout is nice in that it allow minor misalignment of the rails without causing them to bind, but will transfer that misalignment to the bed as rotation around the primary constraint (left center). I'll be doing a bunch of testing once I get it back up and printing to see how much that ends up impacting the dimensions on the print.

          If it's bad, I will instead create a rigid extrusion 'T' and mount it directly to the Z carriages, and have my magnetic V blocks at the three ends of the T. The magballs will then be attached upside-down directly to the Railcore bed tabs. This also will have the advantage of limiting thermal conductance to the printed parts given the very small contact area. But it means I'd have to get out the dial indicators again... ðŸĪŠ

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          • dhusoloundefined
            dhusolo
            last edited by

            Are you putting any updates on the Facebook page? I've had my triple Z with railcore bed done for about a year but I'm not gonna lie your setup has my quite intrigued

            whopping pochardundefined 1 Reply Last reply Reply Quote 0
            • whopping pochardundefined
              whopping pochard @dhusolo
              last edited by whopping pochard

              @dhusolo I'm not on Facebook, unfortunately -- definitely bums me out that the BLV community nexus seems to be there!

              I would love to see your build! Any links? Also, how has it worked out for you? Would love to know more! 😄

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              • Vetiundefined
                Veti
                last edited by

                ben is working on all metal parts for the blv.

                https://www.blvprojects.com/post/the-metal-parts-are-finally-here

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                • JamesMundefined
                  JamesM
                  last edited by

                  I'm actually re-doing my bed mounts after seeing you using the extrusion pieces. It gave me an idea and I'll see how it works. Have to design and print a few things first 🙂

                  whopping pochardundefined 1 Reply Last reply Reply Quote 0
                  • whopping pochardundefined
                    whopping pochard @JamesM
                    last edited by

                    @JamesM Sweet, I look forward to seeing the result!

                    dhusoloundefined 1 Reply Last reply Reply Quote 0
                    • dhusoloundefined
                      dhusolo @whopping pochard
                      last edited by

                      @whopping-pochard No links. I just swapped to a Duet 3 but I haven't published my parts. As far as the bed leveling has been once I got the offsets right it's been awesome. My biggest thing was bed stability so I redid my bed carriage. Now mine has 3x 331mm on Y (with one in the middle for extra stability and reduce possibility of twisting) and 2x 400mm on the X. With those dimensions the bed mounts are directly in the center of the 2020 channel so less printed parts needed to mount it.

                      It's not the current setup but it's my most current picture I have
                      Cube.jpg

                      whopping pochardundefined 1 Reply Last reply Reply Quote 1
                      • whopping pochardundefined
                        whopping pochard @dhusolo
                        last edited by

                        @dhusolo Looks great!

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                        • Vetiundefined
                          Veti
                          last edited by

                          If you are willing to beta test.

                          https://www.aliexpress.com/item/1005001323175853.html

                          MartinNYHCundefined 1 Reply Last reply Reply Quote 0
                          • MartinNYHCundefined
                            MartinNYHC @Veti
                            last edited by

                            @Veti said in My BLV MGN cube build/upgrade saga (ongoing):

                            If you are willing to beta test.
                            https://www.aliexpress.com/item/1005001323175853.html

                            I just placed my order. Incredible price 🙂

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                            • whopping pochardundefined
                              whopping pochard
                              last edited by

                              Wow, that is indeed amazing! I'm tempted to order one myself, even though I'm not sure how many components I could use from it at this point...

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                              • dhusoloundefined
                                dhusolo
                                last edited by

                                Word of warning those metal parts are still in the beta phase. It's entirely possible those parts might need revisions. Personally I won't upgrade to the metal parts until Ben and I work out the details of an official triple or even a quad Z axis with independent leveling.

                                Vetiundefined 1 Reply Last reply Reply Quote 0
                                • Vetiundefined
                                  Veti @dhusolo
                                  last edited by

                                  @dhusolo
                                  i would really like to take part in the beta, but i am not on facebook (and i wont get an account)

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                                  • dhusoloundefined
                                    dhusolo
                                    last edited by

                                    You don't need to have Facebook for it and it's not really an "official" beta. The parts have been released to only one specific supplier on Aliexpress. Anyone can order them. There's no signup to get them. You just buy them

                                    Vetiundefined 1 Reply Last reply Reply Quote 0
                                    • Vetiundefined
                                      Veti @dhusolo
                                      last edited by

                                      @dhusolo
                                      can you answer some questions?

                                      where do the endstops on the x carriage go now? the bottom seems to be different and no space to mount the endstop.

                                      are the mounting holes on the x carriage compatible with the hemera?

                                      does the original hotend cooling fan cover fit?
                                      does the original part cooling fan duct fit?

                                      dhusoloundefined 1 Reply Last reply Reply Quote 0
                                      • dhusoloundefined
                                        dhusolo @Veti
                                        last edited by

                                        @Veti I'm not entirely sure. I haven't seen any of the cad drawings to see how it's assembled. I won't purchase the metal parts until a suitable triple/quad independent Z axis is developed.

                                        However I was mistaken. You do need to be on the Facebook group to have access to the beta metal parts

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                                        • I_Jediundefined
                                          I_Jedi @MartinNYHC
                                          last edited by

                                          I used blind joints with my Misumi extrusions and it was worth every penny! Misumi's cuts were spot on and when done, no angle was off my more than .3 degrees using my digital square. And SOLID as a rock to! Thanks to @Nuramori for the suggestion!

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                                          • Vetiundefined
                                            Veti
                                            last edited by

                                            the metal parts have now been released.

                                            https://www.blvprojects.com/post/new-metal-kit-upgrade-blv-mgn-cube

                                            not sure if i will get them as i like a direct extruder setup, and so far its only bowden

                                            whopping pochardundefined dhusoloundefined MartinNYHCundefined 3 Replies Last reply Reply Quote 1
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